<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert title="添加商品信息" type="info" show-icon center :closable="false"></el-alert>

      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormrules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTableLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="CateList"
                :props="CateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in this.manyParamsList"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in this.onlyParamsList"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals[0]"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传的接口 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewdialogVisible" width="50%">
      <img :src="previewPath" alt class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash"; //导入loadsh插件
export default {
  data() {
    return {
      activeIndex: "0",
      CateList: [],
      manyParamsList: [],
      onlyParamsList: [],
      previewdialogVisible: false,

      // 上传图片的路径
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewPath: [],
      CateProps: {
        label: "cat_name",
        expandTrigger: "hover",
        children: "children",
        value: "cat_id"
      },

      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        // 商品的详情描述
        goods_introduce: "",
        attrs: []
      },
      addFormrules: {
        goods_name: [
          {
            required: true,
            message: "请输入商品名称",
            trigger: "blur"
          }
        ],
        goods_price: [
          {
            required: true,
            message: "请输入商品价格",
            trigger: "blur"
          }
        ],
        goods_weight: [
          {
            required: true,
            message: "请输入商品重量",
            trigger: "blur"
          }
        ],
        goods_number: [
          {
            required: true,
            message: "请输入商品数量",
            trigger: "blur"
          }
        ],
        goods_cat: [
          {
            required: true,
            message: "请选择商品分类",
            trigger: "blur"
          }
        ]
      }
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);

      console.log(res.data);
      this.CateList = res.data;
    },
    handleChange() {
      var len = this.addForm.goods_cat.length;
      if (len != 3) {
        this.addForm.goods_cat = [];
      }
    },
    async getParamsList(id) {
      const { data: res } = await this.$http.get(
        `categories/${id}/attributes`,
        { params: { sel: this.actName } }
      );
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
      });

      if (this.actName == "many") {
        this.manyParamsList = res.data;
        console.log(this.manyParamsList);
      } else {
        this.onlyParamsList = res.data;
        console.log(this.onlyParamsList);
      }
    },
    beforeTableLeave(activeName, oldActiveName) {
      console.log(activeName);
      console.log(oldActiveName);
      if (oldActiveName === "0" && this.addForm.goods_cat.length != 3) {
        this.$message.warning("请先选择商品分类");
        return false;
      }
    },
    tabClicked() {
      console.log(this.cateId);
      if (this.activeIndex == "1" || this.activeIndex == "2") {
        this.getParamsList(this.cateId);
      }
    },
    // 控制图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewdialogVisible = true;
    },
    // 处理移除图片的函数
    handleRemove(file) {
      // 获取要删除的图片路径
      const filePath = file.response.data.tmp_path;
      // 从pic数组中找到对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath);
      // 调用splice方法，移除
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      //console.log(response)
      // 拼接得到图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      // push到pic数组上
      this.addForm.pics.push(picInfo);
      //console.log(this.addForm)
    },
    // 添加商品
    addGoods() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项");
        }

        // 执行添加操作
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // 处理动态参数
        this.manyParamsList.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          };
          this.addForm.attrs.push(newInfo);
        });
        // 处理静态属性
        this.manyParamsList.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        console.log(form);

        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg);
        this.$message.success(res.meta.msg);
        this.$router.push("/goods");
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length == 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
    actName() {
      if (this.activeIndex == "1") {
        return "many";
      } else if (this.activeIndex == "2") {
        return "only";
      } else {
        return null;
      }
    }
  }
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}

.previewImg {
  width: 100%;
  height: 80%;
}

.btnAdd {
  margin-top: 15px;
}
</style>